Some times after opening the valve on the tank it might take a few re-tries. With new units there is a possibility small debris clogging the orifices. Special if they didn't blow the main line with air at manufacturing.
Do Not Put a higher pressure than 11" WC on the appliances (unless they are all disconnected)
2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-6500 lbs.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power
ALJO 'Forever Young @ Heart' provide on their travels Music Entertainment to Senior Care Homes